RING MY BELL: The bell received as the cryptic invitation to the Valentino show Wednesday afternoon had guests musing, and there was no shortage of ideas about what to do with it. “It’s going to be really useful when I go on tour,” said Lily Allen. With her tour starting in March, it won’t be long before Allen puts her bell to good use. “In the next few days I start a month-long rehearsal for my tour,” she said. “That’s my baby, my project, we have new collections coming up in time for fashion week in September,” she said.